Fixed arrow function in runtime

Author: squidfunk

package.json

@@ -7,7 +7,7 @@
     "polyfill",
     "iframe"
   ],
-  "homepage": "https://squidfunk.github.io/iframe-worker/",
+  "homepage": "https://github.com/squidfunk/iframe-worker",
   "bugs": {
     "url": "https://github.com/squidfunk/iframe-worker/issues",
     "email": "[email protected]"

src/worker/index.ts

@@ -97,7 +97,7 @@ export class IFrameWorker implements Worker {
           <script>
             postMessage = parent.postMessage.bind(parent)
             importScripts = ${importScripts}
-            addEventListener("error", ev => {
+            addEventListener("error", function(ev) {
               parent.dispatchEvent(new ErrorEvent("error", {
                 filename: "${this.url}",
                 error: ev.error